Harrow



(No Modeld J. H. HIGGINS.

HARBOW. V No. 893,156. Patented Nov. 20. 1888.

WITNESSES INVENTOR:

ATTORNEYS.

rrrc.

JOHN H. HIGGINS, OF CHARLESTON, MAINE.

HARROW.

SPECIFICATION forming part of Letters Patent No. 393,156, dated November 20, 1888.

Application filed December 7, 1887. Serial No. 257,193. -(No model.)

To all whom it 72mg concern:

Be it known that I, JOHN H. HIGGINS, of Charleston, in the county of Penobscot and State of Maine, have invented a new and Improved Harrow, of which the following is a full, clear, and exact description.

My invention relates to a spring-tooth harrow; and it consists, principally, in forming the frame in two sections hinged together and adapted to be rigidly locked parallel to each other to improve the efliciency of the harrow in leveling the ground.

The invention also consists of the special construction of the barrow-frame and of the clips used in securing the spring-teeth thereto.

Reference is to be had to the accompanying drawings, forming a part of this specification,

in which similar letters of reference indicate corresponding parts in all the figures.

Figure 1 is a plan view of my new and improved harrow. Fig. 2 is a front end elevationof the same. Fig. 3 is a broken plan View of the hinge connection of the rear ends of the sections of the harrow; and Figs. 4, 5, and 6 show difi'erent forms of clips for holding the spring-teeth to the bars of the barrow-frame.

A'A represent the two sections of the harrow, each composed of the head-piece (t and bars aa,n1ortised into the head-piece a at right angles to said head-piece and parallel to each other. Upon the upper surface of the bars a a are secured by the clips 13 and bolts 1) b the spring-teeth O. The inner ends of the headpieces a project past the inner bars, a, as shown at d, to space the sections A, and these projections d have square abutting ends and are secured together by the heavy hinge D at their under surface, the said abutting ends serving to prevent either of the sections A from swinging upward above a level with the other section. One of the projections d is provided with a stud, f, or other fastening device for the plate f of the other projection to engage for locking the sections A A rigidly together, so that they act as one frame. The rear ends of the sections A A are connected together by the irons E E, bolted to the bars a a, and formed at their adjacent ends with the projections 0 c, pivoted together to form a hinge on the same level as the hinge D, so that the sections may be folded face to face without cramping either hinge. The plate E is provided with a stop, f", which, together with the abutting ends of the projections d, prevents the sections A A from opening or being turned one above the other.

The clips B, for holding the spring-teeth C, may be of various forms, as illustrated in Figs. 4, 5, 6, and 7, each with diagonally-opposite holding flanges or projections for engaging the spring-tooth, so that the clip may be reversed when desired. The clip shown in Fig. 4. is a rectangular plate formed with downwardlyprojecting flanges d d at its edges, between the diagonally-opposite corners of which flanges the spring-tooth is held, and it is formed with a bolt-hole, c, at each corner,which makes the clip reversible. The clip shown in Fig. 5 is S-shaped,with studs 6 projecting both above and below its ends, and is formed with two bolt-holes, 0, so that it may be used either side up to cause either set of studs to engage the tooth. The clip shown in Fig. 6 is bent down at its corners to form the studs 9 thereat,whieh engage with and hold the tooth. Each tooth is held by only two bolts, so that the wooden bars of the harrow are not unnecessarily weakened as would be the case if four bolts were used for each tooth, and the two bolts are arranged at opposite edges of the tooth, and the flanges at the edges of the clips prevent the tooth from turning sidewise out of place. 7

The locking-plate f is formed with a slot, f", to engage with the stud f under the head thereof, so that the said plate and stud form a cheap and efficient lock for the sections of the harrow; but any other form of lock might be used.

By adapting the sections of the harrow to be locked rigidly together the harrow becomes much more effective in leveling the ground.

Having thus described my invention. what I claim as new, and desire to secure by Letters Patent, is

1. The head-pieces a a of the sections A A, extended, as shown at d, andlflformedgwith abutting ends and hinged together, in eombination with a locking device, f f, at the upper surface of the head-pieces, substantially as described.

IOO

2. The sections A A, formed of head-pieces formed with the stop f substantially as dea a and bars a, and the plates E E, formed scribed. with projections c c, hinged together, in com- .bination with the hinge D and locking device JOHN HIGGINS 5 f f, the adjacent ends of the head-pieces a Witnesses:

a being extended and constructed to abut WILLIS E. PARSONS,

squarely against each other, and the plate E, CHARLES W. HAYES. 

